A stable political and economic climate allowed EFE to complete its largest-ever investment programme in December 2005. This involved spending US$1bn in 2003-05 to increase capacity on commuter networks and improved long-distance services.[1]

Another line connecting two countries is the Salta-Antofagasta, single 1,000 mm (3 ft 33⁄8 in) gauge.

Peru - a single 1,435 mm (4 ft 81⁄2 in) gauge connection between the northern Chilean city of Arica and Tacna in Southern Peru. The line closed in 2012, but As of June 2014[update], there were plans to reopen it.[3]